Service parts for the MDKBH
Grouped by system, with how many of each the parts manual calls for.
Fuel system
1 requiredOil system
1 requiredBelts
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
Ratings spec sheet not in our library yet — see the documents below.
Maintenance & consumables
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Fuel filter | Fuel Filter | 149-2106 | Amazon $15.99 eBay $34.99 KuduParts $68.00 | ||
| Oil filter | Oil Filter | 185-7444 | Amazon $30.33 eBay $29.95 KuduParts $11.00 | ||
| Belt | V-Belt | 511-0197 | Amazon eBay |
Service intervals
18| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Battery | Check | 8 hr | Every Day / 8 Hrs; see battery manufacturer's recommendations | |
| Engine Oil Level | Check | 8 hr | Every Day / 8 Hrs | |
| General Inspection | Inspect | 8 hr | Includes inspection of oil level, coolant level, fuel system, exhaust system, batteries and battery connections; before first start of day and after every 8 hours | |
| V-Belt Tension | Check | 100 hr | 1 mo | Every Day / 8 Hrs; check for slippage, cracking and wear (pump drive belt only) |
| Battery and Battery Connections | Inspect | 100 hr | 1 mo | See battery manufacturer's recommendations |
| Fuel Filters | Drain | 100 hr | 1 mo | Every Month / 100 Hrs |
| Siphon Break | Check | 100 hr | 1 mo | Every Month / 100 Hrs |
| Siphon Break | Inspect | 100 hr | 1 mo | |
| Water from Fuel Filter | Drain | 100 hr | 1 mo | Every Month/100 Hrs |
| Engine Oil and Oil Filter | Change | 200 hr | 12 mo | First service — Every Year/200 Hrs |
| Fuel Filters | Replace | 200 hr | 12 mo | Every Year/200 Hrs |
| Oil/Oil Filter | Change | 200 hr | First service — Every Year / 200 Hrs | |
| Pump Impeller | Replace | 200 hr | Every Year / 200 Hrs | |
| Brushes/Slip Rings | Check | 500 hr | Every Year / 500 Hrs; must be performed by a trained and experienced mechanic | |
| Raw Water Impeller | Replace | 500 hr | 12 mo | Every Year/500 Hrs |
| Engine Valve Lash | Adjust | 800 hr | Must be performed by a qualified mechanic in accordance with the engine and genset Service Manuals | |
| Generator Bearings, Drive Belt, Belt Tensioner & Drive Coupling | Check | 2000 hr | 60 mo | Every 5 Years/2000 Hrs; must be performed by a qualified mechanic |
| Coolant, Pressure Cap & Thermostat | Replace | 24 mo | Every 2 Years; there is no zinc anode to replace |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Service specifications
60| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Gap | V-belt deflection | 0.4 | inch (10 mm) | 20 pounds (10 kg) applied to middle of pulley span |
| Injection timing | Fuel Injection Timing | 18° – 20° | BTDC | |
| Injection timing | Fuel injection timing | 18 - 20 | degrees BTDC | timing marks line up at 19 degrees BTDC |
| Other | Battery cable gauge | 1 | AWG | total cable length 22 ft (6.7 m); approx. diameter 9.43 mm |
| Other | Battery cable gauge | 1/0 | AWG | total cable length 30 ft (9.1 m); approx. diameter 9.46 mm |
| Other | Battery cable gauge | 2 | AWG | total cable length 18 ft (5.5 m); approx. diameter 7.42 mm |
| Other | Battery cable gauge | 3 | AWG | total cable length 14 ft (4.3 m); approx. diameter 6.61 mm |
| Other | Battery cable gauge | 4 | AWG | total cable length 10 ft (3 m); approx. diameter 5.88 mm |
| Other | Compression Ratio | 23:1 | ||
| Other | Fuel Injection Order (Firing Order, clockwise rotation) | 1-2 | ||
| Other | Published Standard Repair Time (example: productive 3.48 hr + 5% personal + 10% supplementary) | 4.0 | hours | example calculation in foreword |
| Pressure | Cooling System Pressure | 10 | psi | |
| Pressure | Cooling system pressure (pressure cap) | 10 | psi | |
| Pressure | Fuel injection pressure | 1991 | psi (13.73 MPa) | |
| Pressure | Maximum Exhaust Back Pressure | 3 | inch Hg (76 mm Hg) | |
| Pressure | Minimum engine oil pressure (shutdown/service threshold) | 14 | psi (98 kPa) | |
| Resistance | Battery charging winding B1-B2 | 0.114 | ohms | @ 77 F (25 C) +/-10% |
| Resistance | Coolant temperature sender E2 | approximately 800 | ohms | room temperature |
| Resistance | Field winding F1-F2 | 32 | ohms | @ 77 F (25 C) +/-10% |
| Resistance | Governor actuator stator | 1.7-2.8 | ohms | |
| Resistance | Oil pressure sender E1 | 227-257 | ohms | 0 psi, engine stopped |
| Resistance | Quadrature winding Q1-Q2 | 2.93 | ohms | @ 77 F (25 C) +/-10% |
| Resistance | Rotor/stator winding insulation to ground | minimum 1 | megohm | |
| Resistance | Stator main winding T1-T2, T3-T4 | 0.353 | ohms | @ 77 F (25 C) +/-10% |
| Speed | Engine/Generator Speed | 2400/3000 | rpm | 50 Hz |
| Speed | Engine/Generator Speed | 2900/3600 | rpm | 60 Hz |
| Speed | Engine/generator speed (50 Hz) | 2400/3000 | rpm | 50 Hz |
| Speed | Engine/generator speed (60 Hz) | 2900/3600 | rpm | 60 Hz |
| Speed | High-idle speed | 3300-3400 | rpm | |
| Speed | Maximum cranking duration | 20-60 | seconds | engine temperature dependent |
| Speed | Preheat duration prior to cranking | max 15 | seconds | engine temperature dependent |
| Speed | Rated RPM (50 Hz) | 2400 | rpm | |
| Speed | Rated RPM (60 Hz) | 2900 | rpm | |
| Speed | Starter disconnect speed | 800 | rpm | |
| Temperature | Engine room temperature (best performance) | 40 | °C (104 °F) | maximum recommended |
| Temperature | Generator set air inlet temperature | 50 | °C (122 °F) | should not exceed under full load |
| Torque | Drive coupling nuts | 8 | lb-ft (12 N-m) | |
| Torque | Engine-generator adapter mounting bolts (6) | 21 | lb-ft (29 N-m) | |
| Torque | Exhaust manifold nuts (4) and mixer bolts (3) | 8 | lb-ft (11 N-m) | |
| Torque | Fan hub bolt | 45 | lb-ft (61 N-m) | |
| Torque | Flywheel mounting bolts (5) | 42 | lb-ft (56 N-m) | |
| Torque | Front engine support bracket bolts (3) | 41 | lb-ft (55 N-m) | |
| Torque | Generator end bell support bracket bolts | 8 | lb-ft (11 N-m) | |
| Torque | Generator inlet air duct mounting bolts (3) | 8 | lb-ft (12 N-m) | |
| Torque | Generator pulley center bolt | 45 | lb-ft (60 N-m) | |
| Torque | Governor actuator stator screws | 24 | lb-in (2.7 N-m) | |
| Torque | Heat Exchanger Mounting Bolts | 19 | lb-ft (26 N-m) | |
| Torque | Heat exchanger mounting bolts (4) | 19 | lb-ft (26 N-m) | |
| Torque | Hub-to-flywheel bolts (4) | 21 | lb-ft (29 N-m) | |
| Torque | Starter ground bolt | 41 | lb-ft (55 N-m) | |
| Torque | Starter mounting bolts | 29 | lb-ft (39 N-m) | |
| Torque | Stator through bolts and end bell bracket bolts | 8 | lb-ft (11 N-m) | |
| Torque | Tensioner pulley center pivot bolt | 45 | lb-ft (60 N-m) | |
| Torque | Vibration isolation mount through bolts and mounting bolts to drip pan | 20 | lb-ft (27 N-m) | |
| Valve clearance | Valve Lash | 0.0059 – 0.0073 | inch (0.145 – 0.185 mm) | cold |
| Valve clearance | Valve lash (intake and exhaust) | 0.0059-0.0073 | inch (0.145-0.185 mm) | cold |
| Voltage | Battery charge winding B1-B2 output | 15-20 | VAC | |
| Voltage | Battery charging regulator output (minimum acceptable) | 12.8 | VDC | |
| Voltage | High battery voltage fault threshold | 19.2 | volts | at startup |
| Voltage | Voltage adjustment step (control switch or digital display) | 0.6 | volts | per press and release of START |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Recommended fluids
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Coolant | Fleetguard ES Compleat and EG Premix (ethylene glycol based) | ||||
| Coolant | 50/50 mixture of water and ethylene glycol | Fully formulated with rust inhibitors and coolant stabilizers; use low-mineral fresh water, distilled water best | above -37°C | 2.1 liter | Provides protection from freezing down to -34 F (-37 C) |
| Coolant | Ethylene glycol antifreeze, fully formulated with rust inhibitors and coolant stabilizers; 50/50 mixture of water and ethylene glycol | above -37°C | 2.1 liter | Protection from freezing down to -34°F (-37°C); use fresh water low in minerals, distilled best | |
| Engine oil | Premium Blue E 15W40 | 2.1 L (2.2 qt) | Lubricant oil - Premium Blue E 15W40 | ||
| Engine oil | SAE 15W-40 (multigrade) recommended for year-round use | API Service Category CI-4 or better | 2.1 liter | Choose viscosity grade appropriate for ambient temperatures expected until next scheduled oil change | |
| Engine oil | SAE 15W-40 multi-grade recommended for year-round use | API Service Category CI-4 or better | 2.1 liter | Choose viscosity grade appropriate for ambient temperatures expected until the next scheduled oil change (Figure 3-1) | |
| Fuel | Gas Oil (red diesel, fuel oil, type A1 or A2) | USCG TYPE A1 or ISO 7840-A1 fuel hoses | |||
| Fuel | Grade 2-D diesel fuel (Grade 1-D if tank exposed below 40 F (5 C)) | EN 590 or ASTM D975; Cetane number not less than 45; sulfur content not more than 0.5 percent by weight | Fuel lubricity: minimum load level 3100 grams per ASTM D6078 or maximum scar diameter 0.45 mm per ASTM D6079 or ISO 12156-1 | ||
| Fuel | High quality Grade 2-D diesel fuel; use Grade 1-D if fuel tank exposed to temperatures below 40°F (5°C) | EN 590 or ASTM D975 | Cetane number not less than 45; sulfur content not more than 0.5 percent by weight; fuel lubricity min 3100 grams per ASTM D6078 or max scar diameter 0.45 mm per ASTM D6079/ISO 12156-1 |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Fault codes
32| Code | Name | Meaning | Severity | Action |
|---|---|---|---|---|
| 1 | High Engine Temperature | Engine coolant temperature exceeded design limit | Shutdown | Open sea valve; clean sea water strainer; check coolant level and repair leaks; check/replace raw water hoses; readjust a loose pump belt (p. 4-9); replace worn raw water impeller (p. 4-10); clean heat exchanger (p. 4-12); check through-hull; drain/clean cooling system (p. 4-6); replace coolant thermostat (p. 4-8); tighten coolant sender E2 ring terminal; test/replace sender E2; check continuity Pin 9 to E2 |
| 12 | Overvoltage | After voltage regulation was enabled, output voltage jumped to more than 125% of rated for 75 milliseconds or more than 115% of rated for 3 seconds | Shutdown | See an authorized Onan service representative. |
| 13 | Undervoltage | After voltage regulation was enabled, output voltage fell to less than 90% of rated for 5 seconds | Shutdown | Reduce electrical loads; check fuel tank; remove air/exhaust blockages; prime fuel system; check fuel filters and fittings; replace fuel filters; check brushes/slip rings and windings; conduct fuel pump test; check governor actuator; readjust high idle speed; service injectors; check injection timing; check internal governor; service worn engine; replace controller |
| 14 | Overfrequency | After the starter was engaged, frequency jumped to more than 70 Hz for 40 milliseconds or to more than 2% over nominal for 6 seconds | Shutdown | Check for a tripped genset circuit breaker, reset it if necessary and run with fewer connected loads; check all fuel fittings for leaks and tighten and reprime. |
| 15 | Underfrequency | During normal operation, frequency fell to less than 90% of nominal for more than 8 seconds | Shutdown | Reduce loads with high motor starting loads; check fuel tank; remove air/exhaust blockages; prime fuel system; check fuel filters and reprime; replace fuel filters; conduct fuel pump test; check governor actuator; readjust high idle speed; service injectors; check injection timing; check internal governor; service worn engine; replace controller |
| 17 | Overprime | |||
| 2 | Low Oil Pressure | Low oil pressure | Shutdown | Check oil level; tighten sender E1 ring terminal; check sender E1 resistance and replace if necessary; check continuity Pin 10 to E1; replace sender with a gauge and service the engine lubrication system if oil pressure is less than 14 psi (98 kPa) |
| 22 | Governor Overload | Maximum allowable time at full-duty cycle was exceeded | Shutdown | Reduce the number of appliances running at the same time; check the fuel tank and fill; remove any blockage in the combustion air inlet or exhaust system; check fuel fittings for leaks and reprime; replace the fuel filters and reprime. |
| 23 | Faulty Oil Pressure Sender | Controller sensed grounded sender | Shutdown | Tighten the ring terminal on sender E1; check continuity between Pin 10 and ring terminal E1-1; test sender E1 and replace as necessary; replace the genset controller |
| 24 | Faulty Temperature Sender | Controller sensed open sender | Shutdown | Tighten the ring terminal on sender E2; check continuity between Pin 9 and ring terminal E2-1; test sender E2 and replace as necessary; replace the genset controller |
| 27 | Loss of Voltage Sense | The genset Controller lost VAC sensing during normal voltage regulation when the field was functioning normally and frequency was at least 40 Hz | Shutdown | See an authorized Onan service representative. |
| 29 | High Battery Voltage | During startup the genset Controller sensed that battery system voltage was greater than 19.2 volts | Shutdown | Check battery bank connections and reconnect if necessary for 12 volts; select a lower battery booster charge rate. |
| 3 | Service Check | A fault with a 2-Digit Fault Code Number occurred | Shutdown | Push and Release Stop to check the 2-Digit fault code (does not apply to e-Series Digital Display) |
| 32 | Starting Fault | The genset Controller could not detect cranking speed (quadrature zero crossings) for 3 seconds | Shutdown | Have the propulsion engines running while trying to start the genset; service the battery; change to oil of proper viscosity for the ambient temperature. |
| 35 | Control Card Failure–EE | During startup the genset Controller detected a EE memory error | Shutdown | See an authorized Onan service representative. |
| 36 | Unknown Shutdown | The genset Controller declared this fault because engine speed fell below 1000 RPM for 0.5 seconds, though not by genset or engine control action | Shutdown | Reduce the number of loads on the genset; check fuel level and refill; prime the fuel system for at least 30 seconds; check fuel fittings for leaks and reprime; replace the fuel filters and reprime. |
| 37 | Invalid Set Configuration | The genset Controller is not configured properly for the genset | Shutdown | See an authorized Onan service representative. |
| 38 | Field Overload | High field voltage induced by high rotor temperature or low power factor loads | Shutdown | Remove blockages to generator air flow; reduce appliances running; have air conditioners checked; check for a loose generator fan; service brushes and slip rings and test the field, stator and quadrature windings; replace a stator or rotor with faulty windings |
| 4 | Overcrank | Cranking time exceeded 20 to 60 seconds, depending on ambient temperature | Shutdown | Push line circuit breaker OFF; check fuel tank and fill; remove combustion air or exhaust blockages; open closed fuel valves; prime the fuel system at least 30 seconds; service the battery; check all fuel filters and fittings and reprime; replace fuel filters; change to proper oil viscosity; conduct fuel pump test; inspect glow plugs; service fuel injectors and worn engine |
| 41 | Grounded Rotor | F+ grounded | Shutdown | Check for continuity between Pin P3-7 (F+) and B- (ground); repair or replace wiring, brushes and slip rings or rotor; replace the genset controller |
| 42 | Control Card ROM | |||
| 43 | Control Card RAM | During startup the genset Controller detected a RAM memory error | Shutdown | See an authorized Onan service representative. |
| 45 | Speed Sense Lost | After start disconnect the genset Controller lost speed sense (quadrature zero crossings) for 0.25 seconds | Shutdown | See an authorized Onan service representative. |
| 46 | Genset Overload | The genset Controller shutdown the genset because engine load exceeded 135 percent of genset rating for 10 seconds | Shutdown | Reduce the number of loads on the genset. |
| 48 | Field Sense Lost-RAM | Controller unable to sense field voltage | Shutdown | Replace the genset controller |
| 5 | Warning—Shutdown Due to Vessel CO | Dangerous levels of Carbon Monoxide in Vessel | Shutdown | Get everyone out into fresh air immediately and seek medical attention. |
| 57 | Overprime | A local or remote control switch was held in the Prime position for more than 5 minutes | Shutdown | Remove any object holding a control switch in the prime position; replace any control switch S4 that does not open across terminals 1 and 2 when Stop is released |
| 58 | High Exhaust Temperature | Exhaust temperature exceeded design limits due to lack of water delivered to the exhaust/water mixer | Shutdown | Open sea valve; clean sea water strainer; check/replace raw water hoses; inspect siphon break; readjust a loose pump belt; replace worn raw water impeller; clean heat exchanger; check continuity between Pin P1-11 and B- and exhaust temperature switch S5 |
| 61 | External Shutdown | Genset was shut down by a fire suppression system or other external control | Shutdown | Make all necessary repairs to the genset and connected equipment and reset the external control which shut down the genset. |
| 7 | Loss of Raw Water Flow | Low raw water pressure in heat exchanger | Shutdown | Open the sea cock; check for and clean a blocked sea water strainer; check for kinked or leaking hoses; check for a worn raw water impeller; check the hull for blockage at the through-hull fitting. |
| Code No. 5 | Warning - Shutdown due to Vessel CO | Shutdown occurring due to the vessel CO detector | Warning | All status indicator lights in the control circuit will also blink the fault code. See Troubleshooting Chapter of the Operator Manual. |
| Code No. 61 | Emergency Shutdown | Shutdown occurring due to external emergency shutdown device | Shutdown | All status indicator lights in the control circuit will also blink the fault code. See Troubleshooting Chapter of the Operator Manual. |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
12Adjusting High-Idle Speed adjustment
⚠ Keep your hands away from the engine belt and pulleys.
⚠ The actuator could overheat if the battery is left on more than 10 minutes.
⚠ Be prepared to clamp off supply and return fuel lines to stop the engine.
Tools: strobe or injector clamp-on tachometer, 12 volt battery, battery switch
- Adjust the speed control lever stop.
- Measure engine speed with a strobe or injector clamp-on type tachometer.
- Remove the front and top access doors and loosen the front/left side panel assembly for access to the speed adjusting screw.
- Disconnect the actuator leads and connect a 12 volt battery to the actuator terminals using a battery switch.
- Switch the battery on, start the genset, measure engine speed (rpm) and stop the engine by switching off the battery.
- Loosen the lock nuts on the two bottom screws and back out the clamping screw if speed is not between 3300 and 3400 rpm.
- To increase speed turn the speed adjusting screw in 1 turn clockwise; to decrease turn it out 1 turn counterclockwise.
- Repeat until high-idle speed is between 3300 and 3400 rpm and set the lock nut.
- Run the clamping screw in by hand until snug, back it out 1-1/2 turns and set the lock nut.
Adjusting Speed Control Lever Stop adjustment
⚠ Accidental or remote starting can cause severe personal injury; disconnect the negative battery cable.
- Remove the front and top access doors and loosen the front/left side panel assembly so it can swing left.
- Loosen the stop screw locknut and back the screw out a few turns.
- Turn the stop screw in until it just makes contact and set the locknut.
Adjusting V-Belt Tension adjustment
⚠ Disconnect the negative battery cable to prevent accidental starting.
Tools: open-end wrench, 3/8 inch drive socket
- Disconnect the negative battery cable to prevent the engine from starting.
- Remove the front and top access doors; remove the end panel if work space is limited.
- Loosen both bolts so that the pump can pivot.
- Pivot the pump out to tighten belt tension and hold by tightening the tension adjusting bolt.
- Check tension by applying 20 pounds (10 kg) to the middle of the pulley span; deflection should be 0.4 inch (10 mm).
- Tighten the bolts, reassemble the panels and doors and reconnect the battery cables (negative last).
Adjusting Valve Lash adjustment
⚠ Do not use the fuel injection timing marks when adjusting valve lash.
- Rotate the engine clockwise (looking from the front) until the intake valve push rod just stops moving down (valve closed).
- Turn the engine one half turn more.
- Adjust lash for both intake and exhaust valves of that cylinder.
- Repeat this procedure for the other cylinder.
Adjusting Voltage Using Control Switch adjustment
Tools: separate voltmeter
- Start the genset and let voltage and frequency stabilize for 5 to 10 seconds with all loads disconnected.
- Rapidly press START 6 times during the first minute after startup to enter voltage adjust mode.
- To adjust voltage up, press and quickly release START (about 0.6 volts per press).
- To adjust voltage down, press and hold START for about 2 seconds (about 0.6 volts each press).
- Wait about 20 seconds for the amber lamp to stop blinking, then press STOP to save the adjustment.
- Restart the genset and check voltage.
Adjusting Voltage Using Digital Display adjustment
- Start generator set and let voltage and frequency stabilize 5 to 10 seconds; disconnect all loads.
- Rapidly press START 6 times during the first minute after startup to enter voltage adjust mode.
- Press and quickly release START to increase voltage approximately 0.6 volts per press.
- Press and hold START about 1 second to adjust voltage down.
- Wait about 20 seconds for status to change from Volt Adj to Running, then press STOP to save.
- Restart the generator set and check voltage; recalibrate AC voltage on the digital display.
Adjusting Voltage Using Optional Digital Display adjustment
Tools: Separate voltmeter
- Start the genset and let voltage and frequency stabilize for 5 to 10 seconds; make sure all loads have been disconnected.
- Rapidly press START 6 times during the first minute after startup to put the genset controller into voltage adjust mode.
- To adjust voltage up, press and quickly release START; voltage increases approximately 0.6 volts each press and release.
- To adjust voltage down, press and hold START for about 1 second; voltage decreases approximately 0.6 volts each press and release.
- Wait about 20 seconds for the Display to indicate a Status change from Volt Adj to Running, then press STOP to stop the genset and save the adjustment.
- Restart the genset and check voltage.
- Recalibrate AC Voltage on the Digital Display as instructed in the Operator's Manual.
Changing Frequency adjustment
- Connect J5 to P6 for 60 HZ.
- Disconnect J5 from P7 for 50 HZ.
- Apply the appropriate reconfiguration label.
Changing Generator Set Frequency adjustment
⚠ When changing frequency, make sure the line circuit breakers are suitable for the new output.
- Remove the control box cover.
- Connect J5 to P6 for 60 Hz.
- Disconnect J5 from P7 for 50 Hz.
- Apply the appropriate reconfiguration label.
- Replace the control box cover.
- Check and adjust voltage as necessary after the frequency has been changed.
Configuring the Controller Using Control Switch adjustment
⚠ In configuration mode the control will not start, prime or display faults.
- Remove the insulating connectors from harness connectors CONFIG 1 and CONFIG 2 and connect them together.
- Press START to increase the code number or STOP to decrease it one unit each press.
- Set the configuration code number to 19 for this genset.
- Verify the status lamp blinks one blink, pause, then nine blinks.
- Disconnect CONFIG 1 from CONFIG 2 and re-install the insulating connectors.
Disabling Battery Charger adjustment
- Disconnect the leads marked B1, B2 and B+ from the quick-connect terminals on battery charging voltage regulator.
- Insulate the end of each lead with several wraps of listed electrical insulating tape and tie them neatly into the wiring harness.
- Secure the access cover when done.
Valves - Adjust adjustment
- Disconnect and connect battery cables, engine wiring harness, fuel lines, exhaust hose, coolant hoses
- Drain and refill engine fluids
- Remove and install soundshield, glowplugs, valve cover
- Adjust valve lash
- Test run unit
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Voltage reconnection
| Voltage | Phase | Connection | Leads | Notes |
|---|---|---|---|---|
| 50 Hz: Disconnect J5 from P7 | J5, P6, P7 | Frequency selection jumper leads in the genset control box | ||
| 60 Hz: Connect J5 to P6 | J5, P6, P7 | Frequency selection jumper leads in the genset control box |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Common questions
Which oil filter part number does the Cummins/Onan MDKBH take?
The Cummins/Onan MDKBH uses oil filter part number 185-7444.
Which fuel filter part number does the Cummins/Onan MDKBH take?
The Cummins/Onan MDKBH uses fuel filter part number 149-2106.
Troubleshooting
4Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| NO RESPONSE AT OPERATOR PANEL OR CONTROL SWITCH | Faulty switch, poor or missing connections, dead battery | 1. Push the Emergency Stop Breaker ON if tripped. 2. Try the Operator Panel or control switch on the generator set (local) if there is no response at a remote Operator Panel or control switch, and vice versa.. 3. If none of the Operator Panels or control switches works, service as necessary by cleaning and tightening battery connections, recharging or replacing the battery or replacing damaged battery cables (p. 4-3). |
| THE STARTER ENGAGES AND DISENGAGES | Low cranking voltage | 1. Push the generator set line circuit breaker OFF. 2. Service the battery as necessary by cleaning and tightening connections, recharging or replacing the battery or replacing damaged battery cables (p. 4-3). |
| THE STARTING BATTERIES DO NOT MAINTAIN A CHARGE | Marginal battery, battery connections or charging system | 1. Service the battery as necessary by cleaning and tightening connections, recharging or replacing the battery or replacing damaged battery cables (p. 4-3). 2. Check for and disconnect parasitic battery loads. |
| NO AC POWER WHEN GENERATOR SET IS RUNNING | A Circuit Breaker is OFF |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Parts
91| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 0155-2030 | Lift muffler, sea water strainer, hose clamps (8), instruction sheet | Muffler | Amazon eBay | |
| 0155-3087 | Auxiliary drive cover, cover seal, four bolts, inlet and outlet keel cooling assemblies, coolant hoses, instruction sheet | Keel cooling kit | Amazon eBay | |
| 0155-3148-02 | Keel cooling inlet and outlet assemblies, coolant hoses, elbow and adapter assembly, instruction sheet | Keel cooling kit | Amazon eBay | |
| 0155-3222 | Lift muffler, sea water strainer, hose clamps (8), instruction sheet | Muffler | Amazon eBay | |
| 0300-5725-01 | Basic remote panel with start/stop switch with run (green) and control status/diagnostic indicator (amber) lamps | Remote panel | Amazon eBay | |
| 0300-5725-02 | Basic remote panel with start/stop switch with run (green) and control status/diagnostic indicator (amber) lamps | Remote panel | Amazon eBay | |
| 0300-5727-01 | Deluxe remote panel with start/stop switch with run (green) and control status (amber) lamps and hour meter | Remote panel | Amazon eBay | |
| 0300-5727-02 | Deluxe remote panel with start/stop switch with run (green) and control status (amber) lamps and hour meter | Remote panel | Amazon eBay | |
| 0300-5899-01 | Basic remote panel with start/stop switch with run (green) and control status/diagnostic indicator (amber) lamps | Remote panel | Amazon eBay | |
| 0300-5899-02 | Basic remote panel with start/stop switch with run (green) and control status/diagnostic indicator (amber) lamps | Remote panel | Amazon eBay | |
| 0300-6363-03 | Set-mounted Cummins Onan Digital Display | Digital display | Amazon eBay | |
| 0333-0702-01 | Heater, cord and instruction sheet | Heater | Amazon eBay | |
| 0333-0702-02 | Heater, cord and instruction sheet | Heater | Amazon eBay | |
| 0338-3167 | Remote panel wire harness—15 ft, 25 ft, 45 ft, 75 ft, 100 ft or 150 ft | Remote panel harness | Amazon eBay | |
| 0338-3168 | Remote panel wire harness—15 ft, 25 ft, 45 ft, 75 ft, 100 ft or 150 ft | Remote panel harness | Amazon eBay | |
| 0338-3169 | Remote panel wire harness—15 ft, 25 ft, 45 ft, 75 ft, 100 ft or 150 ft | Remote panel harness | Amazon eBay | |
| 0338-3169-01 | Remote panel wire harness—15 ft, 25 ft, 45 ft, 75 ft, 100 ft or 150 ft | Remote panel harness | Amazon eBay | |
| 0338-3169-02 | Remote panel wire harness—15 ft, 25 ft, 45 ft, 75 ft, 100 ft or 150 ft | Remote panel harness | Amazon eBay | |
| 0338-3169-03 | Remote panel wire harness—15 ft, 25 ft, 45 ft, 75 ft, 100 ft or 150 ft | Remote panel harness | Amazon eBay | |
| 0338-4016 | Y adapter harness for dual remote stations | Y adapter harness | Amazon eBay | |
| 0338-4017 | Remote station harness pigtail (8 ckt) with 8 wires labeled 1 through 8, each 8 in (203 mm) long. Installer should butt splice connections on the loose end to make the necessary extensions. | Remote station pigtail | Amazon eBay | |
| 0338-4223 | Remote station harness pigtail (8 ckt) | Remote station pigtail | Amazon eBay | |
| 0338-4500 | Remote station harness pigtail (12 ckt) | Remote station pigtail | Amazon eBay | |
| 0541-0590 | Belt guard is required when the sound shield is removed. It covers the belt and pulley at front of engine and protects the operator. | Belt guard | Amazon eBay | |
| 0541-0876-01 | Siphon break assembly, two hose clamps, two rubber grommets and instruction sheet | Siphon break | Amazon eBay | |
| 0541-0876-02 | Siphon break assembly, eight hose clamps, two rubber grommets, two pre-formed rubber hoses, two 3/4 in hose unions and instruction sheet | Siphon break | Amazon eBay $229.91 | |
| 0541-0877-01 | Siphon break assembly, two hose clamps, two rubber grommets and instruction sheet | Siphon break | Amazon eBay | |
| 0541-0941-01 | Remote start/stop switch with dual lamps and mating harness only for panel installation | Remote start stop switch | Amazon eBay | |
| 0541-0941-02 | Remote start/stop switch with dual lamps and mating harness only for panel installation | Remote start stop switch | Amazon eBay | |
| 0541-1124 | Expansion tank, coolant hose adapter fittings, mounting brackets, all mounting hardware and instruction sheet | Expansion tank | Amazon eBay | |
| 0541-1128-01 | Belt guard is required when the sound shield is removed. It covers the belt and pulley at front of engine and protects the operator. | Belt guard | Amazon eBay | |
| 0541-1128-02 | Belt guard, instruction sheet, and all necessary brackets and hardware | Belt guard | Amazon eBay | |
| 0541-1130 | Cummins Onan Digital Display graphical LCD remote display for genset operating parameters and diagnostics | Remote display | Amazon eBay $800.00 | |
| 0541-1133-0X | Electric clutch | Electric clutch | Amazon eBay | |
| 0541-1134 | Lift muffler, sea water strainer, hose clamps (6), instruction sheet | Muffler | Amazon eBay | |
| 0541-1139-0X | Mounting brackets, engine vibration isolators, instruction sheet and all necessary hardware to mount PTO assembly | Vibration isolators | Amazon eBay | |
| 0541-1140 | Front sound shield panel, PTO shield, instruction sheet, and all necessary hardware | Sound shield panel | Amazon eBay | |
| 0541-1152 | Siphon break assembly, six hose clamps, two rubber grommets and instruction sheet | Siphon break | Amazon eBay | |
| 0541-1177-01 | Secondary vibration isolators (4 cyl. engine) | Vibration isolators | Amazon eBay | |
| 0541-1177-02 | Secondary vibration isolators (4 cyl. engine with PTO) | Vibration isolators | Amazon eBay $465.95 | |
| 0541-1177-03 | Secondary vibration isolators (6 cyl. engine) | Vibration isolators | Amazon eBay | |
| 0541-1177-04 | Secondary vibration isolators (6 cyl. engine with PTO) | Vibration isolators | Amazon eBay | |
| 0541-1195-01 | SAE J-1939 CAN data link | Network interface module | Amazon eBay | |
| 0541-1195-02 | SmartCraft Networked™ data link | Network interface module | Amazon eBay | |
| 0541-1195-03 | SAE J-1939 CAN data link | Network interface module | Amazon eBay | |
| 0541-1195-04 | SmartCraft Networked™ data link | Network interface module | Amazon eBay | |
| 0541-1253-01 | Molded rubber hose, hole plug, instruction sheet | Exhaust outlet kit | Amazon eBay | |
| 0541-1253-02 | Molded rubber hose, hole plug, instruction sheet | Exhaust outlet kit | Amazon eBay | |
| 0541-1254-01 | Molded rubber hose, hole plug, instruction sheet | Exhaust outlet kit | Amazon eBay $133.95 | |
| 0541-1254-02 | Molded rubber hose, hole plug, instruction sheet | Exhaust outlet kit | Amazon eBay | |
| 0541-1255-01 | Front (engine end) raw water inlet kit | Raw water inlet kit | Amazon eBay | |
| 0541-1255-02 | Rear (generator end) raw water inlet kit | Raw water inlet kit | Amazon eBay $112.48 | |
| 0541-1255-03 | Rear (generator end) raw water inlet kit | Raw water inlet kit | Amazon eBay | |
| 0541-1270 | Lift muffler, sea water strainer, hose clamps (6), instruction sheet | Muffler | Amazon eBay | |
| 0541-1280-01 | Belt guard is required when the sound shield is removed. It covers the belt and pulley at front of engine and protects the operator. | Belt guard | Amazon eBay | |
| 0541-1281 | Molded rubber hose, instruction sheet | Exhaust outlet kit | Amazon eBay | |
| 0541-1282 | Molded 90º rubber elbow, stainless steel formed tube, straight hose, stainless steel clamps (4), instruction sheet | Exhaust outlet kit | Amazon eBay | |
| 0541-1392-01 | Front (engine end) raw water inlet kit | Raw water inlet kit | Amazon eBay | |
| 0541-1392-02 | Rear (generator end) raw water inlet kit | Raw water inlet kit | Amazon eBay | |
| 0541-1472-01 | Molded rubber hose, hole plug, instruction sheet | Exhaust outlet kit | Amazon eBay | |
| 0541-1472-02 | Molded rubber hose, hole plug, instruction sheet | Exhaust outlet kit | Amazon eBay | |
| 0541-1619-01 | Front (engine end) raw water inlet kit | Raw water inlet kit | Amazon eBay | |
| 0541-1619-02 | Rear (generator end) raw water inlet kit | Raw water inlet kit | Amazon eBay | |
| 0541-1650-01 | Belt guard is required when the sound shield is removed. It covers the belt and pulley at front of engine and protects the operator. | Belt guard | Amazon eBay | |
| 0541-1650-02 | Belt guard is required when the sound shield is removed. It covers the belt and pulley at front of engine and protects the operator. | Belt guard | Amazon eBay | |
| 149-2106 | Fuel Filter Element | 1 | Fuel filter | Amazon $15.99 eBay $34.99 KuduParts $68.00 |
| 185-5421 | Plug, Glow | 4 | Glow plug | Amazon eBay $35.00 |
| 185-7444 | Oil Filter | 1 | Oil filter | Amazon $30.33 eBay $29.95 KuduParts $11.00 |
| 511-0197 | V-Belt | Belt | Amazon eBay | |
| 541-1524 | Pump Impeller | Impeller | eBay $122.63 | |
| A030G027 | Sound shield housing | Sound shield | Amazon eBay | |
| A030G030 | Sound shield with insulated panels, and multiple access ports for all of the necessary connections and maintenance items including lifting eye access. | Sound shield | Amazon eBay | |
| A030G295 | Sound shield with insulated panels, and multiple access ports for all of the necessary connections and maintenance items including lifting eye access. | Sound shield | Amazon eBay | |
| A030J146 | Sound shield with insulated panels, and multiple access ports for all of the necessary connections and maintenance items including lifting eye access. | Sound shield | Amazon eBay | |
| A030J441 | Sound shield with insulated panels, and multiple access ports for all of the necessary connections and maintenance items including lifting eye access. | Sound shield | Amazon eBay | |
| A030J443 | Sound shield with insulated panels, and multiple access ports for all of the necessary connections and maintenance items including lifting eye access. | Sound shield | Amazon eBay $3614.95 | |
| A030K475 | Sound shield with insulated panels, and multiple access ports for all of the necessary connections and maintenance items including lifting eye access. | Sound shield | Amazon eBay | |
| 1000-1500 | Electric Frying Pan or Wok | 1200 | Service part / kit | Amazon eBay |
| 1400-2000 | Battery Charger Up to 3000 DC Converter | Service part / kit | Amazon eBay | |
| 200-500 | Electric Blanket | Service part / kit | Amazon eBay | |
| 200-600 | Radio | 1 | Service part / kit | Amazon eBay |
| 250-750 | Electric Broom | Service part / kit | Amazon eBay | |
| 300-700 | Refrigerator | Service part / kit | Amazon eBay | |
| 350-1000 | Electric Water Heater | Service part / kit | Amazon eBay | |
| 50-200 | Electric Drill | 1 | Service part / kit | Amazon eBay |
| 500-1200 | Electric Hair Dryer | Service part / kit | Amazon eBay | |
| 524-0118 | Molybdenum disulfide paste | Service part / kit | eBay | |
| 550-750 | Television | Service part / kit | Amazon eBay | |
| 600-1000 | Microwave Oven | 1 | Service part / kit | Amazon eBay |
| 800-1500 | Coffee Percolator | Service part / kit | Amazon eBay | |
| 981-0176 | Redistribution or publication of this document, by any means, is strictly prohibited. California | Service part / kit | Amazon eBay |
Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Available documents
Operator's manual — 981-0176 ONAN MDKBH Marine Genset Operator's manual (06-2005) (Cummins/Onan)Parts manual — 0043090 (Cummins/Onan)Service manual — 900-0620B Onan MDKAU MDKBH Repair Times (Onan Corporation (Cummins Power Generation))Service manual — 981-0542 Onan MDKBH Service Manual (11-2005) (Cummins/Onan)Service manual — 981-0643 Onan MDKBH Installation Manual (6-2005) (Cummins/Onan)Service manual — 981-0647 Onan MDKBH Spec A-E Installation Manual (10-2013) (Cummins/Onan)Service manual — Manual Operador Marino QD 6kWz (Cummins/Onan)